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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '598a0854761d99e22f541f91f88e36c0c938319e0830cfa083232ec8908b10a1' 
  AND token = 'qejoJU/PuphpGnaK2NE2lG/JMuR8js/rIILRN9xsC/4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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