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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d0fce3e104912c181ff8606c8fd662fada47cc0b3b1a95c470fba51dac71ba6' 
  AND token = 'IrIqunRG4GQ1Td3a2jQEWgBX4NQ5C51QmA39p7d1AVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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