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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62fee110f49b7ab264891234e1bdef612638922279575c3d833e8e319d43741a' 
  AND token = '68rrKYFjnpxQ6tV+L3maWBw6k0FqNpUsHyxcF8f5LtE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00057

JSON explain

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