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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a7cc32ee8ef0b27d4f5d29a57d6188017de0f1fc87cda26dfc1595ba8dbd6de' 
  AND token = 'Yclv6+Q/q+0KGNSfp+ZoRa9tzIwaLP9SKrDxyT9kmgc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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