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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ef19638be6530c71602322b227efcdd974e25fa3792be9132fc66cab3d46bddc' 
  AND token = '/J+hP0ASGFecJtKsYeeMUixcPnGv4ZrN2s6MA+9qQFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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