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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c026f9f2dfdc84150aa0fdede37fa73413289060e06ec8114da95b7d80502935' 
  AND token = 'wSz0sGDuUl4bEqcPjDhxkgnMh8AShfRK5z1dpxpKdlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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