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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e91dc26f9f7b0c9d2b975229fff62b8a87215ea06cb37606fbda0d435a855b13' 
  AND token = 'YeNez4obipWLA9k7i3Vn7qFjcXr3cjH/X2VR1j6bf1I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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