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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '895afc5d58355fee52f23bdd93bfb3a0fb6827a206952fd289ddbe77b394f929' 
  AND token = 'WD22apRle8aEZ1CVaw+5vGCzy7Qu3JcIOu1Qbjfnlm4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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