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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feb4cf0117eb6a1eb970822e3d0fdc454d060adefe59425097e621191cf384f3' 
  AND token = '2JkYL1eTMloAzDlz9Nd8+r1V+0L5MLGsTpwKHO3yXrM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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