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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64812e24e0403009755e439c2e09edd39e61d101454b65c9a8a2044df10a0f56' 
  AND token = 'xAZV9j/Qtx9QzmrEAtErB7OGx4ahTcciIYY+W/XgEhE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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