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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd6c143c8227933aea1a0f0b7282562b33929bad59c44e52658dcd55d6e069091' 
  AND token = 'qnP1JDXF65xFCEMY5MS7iD4Rwr2NQTSV9lB4FIpSGJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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