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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0de7035e481a4973bb0da39f18d7467282570b77f7de86e0b9bbfd1859149c76' 
  AND token = 'J0VVCmMtcMYxYb1y5hl0Bj53y/vgWjQtaC1qhar/iS8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00109

JSON explain

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