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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '732e14bd7c5dde51497af638588447af5663daf42c745ffce7ca7e3084413bab' 
  AND token = 'sXy5fDriY/J2Sd/I6s5mNyoeO8WO2a+rqb1N6+sUX5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}