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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd86f9468cdef51832204812c0e4484761d5898c5e1b35fae5ab36999c775411a' 
  AND token = '0NZAHBJT7yFynz50bZ4Mmc3wJ9W+wLiCbjm4cxxiUmY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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