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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f001fa5714090c38788405185c80d8899adeef22aa573fc4b7f84dfc3121d6f4' 
  AND token = 'EF+9SuPLGB9Fhq6STQdK01WYqTLAVRgadckNxg/qrCQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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