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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0b5134b9c7e7043a9f6fef4c2fbeb5bedfcfb719a409a6745169f996388ca49' 
  AND token = 'Ea3m6Ew/crYzCX0OWm0IlumFwO3cZ4oEGV70es+1hbo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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