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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30ea351ab62416cf762ab85a3ef28e963d69d457013a412c79f329ddf7012ebf' 
  AND token = 'vkbZW0VhwSz1Ok8tDSRXeXx8bZPaXMV5LnB7a2MSzcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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