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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c3c2981fafc19fe5db14789a79097d6be2829052172602583c7617c7919ea224' 
  AND token = 'CgFdZzqHDGOuKPrAOQ8Y6XIING04wi6z5Ad4bdEB5dI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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