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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f395d93ee0b034ffa5ebf643d0e19694f69224162f1497532df4b7fd6c7c3fca' 
  AND token = 'F7UHhHTASUDrz44Xzm7hLGSAqtfP22qfxHCBAZ7SYDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}