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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fcdd1270cc90741e5291f77ec1973c88d940c78ddc61917ed71a4dc17e1564f5' 
  AND token = 'ed99K3Sr3EpTR76L/C1hyUd0g5FA/rZcf5bE3DcdaUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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