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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7216b76fb452e5678d10911deb93ce0c52f0aaaabe8c423ffb45009dd188a672' 
  AND token = 'AnUxuu0b4T5q7Yr42WvGR3PcaKa6bU+F4s0nasb+cd4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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