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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a2b125adbac92701134ab55c511f3a400f08f5733f1afdcaa9506c675446f07' 
  AND token = 'o24DFFzl/MEdBDts852xg1AFi7QjPD5boBcRaQ6Ps4I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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