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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1b7a11faa93d19bdcc202967b62454eb09339509cff46017790ae131fe8f80ed' 
  AND token = 'qZdBa2AUc9zYQi4L+B0Zc2UaZS09H+KkmKUf0nskfkU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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