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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '011cb80327e131e5b753156af8f17f2d05e6fd73687a3c7ff2a658c9b0b4e90a' 
  AND token = '43O8+uQnc17zzgXW1GHlvRX0hYaxQmZ6tz392PFbvYc=' 
  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"
    }
  }
}