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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1609fee84bc599de866f303277c0680f8d872cf96ce9a7abd3f0e49e9e7c3fb8' 
  AND token = 'wD1IzwVd6nmriAzaAtmmE9fC4s9Ie+IkJ2MW1+leV+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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