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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd762dfa3b31428d3f5f0698abec07f38b471e8b39019a6ff0220044dc9cf34ca' 
  AND token = 's2Ww+f5dM3vjyonZ41WI163DFLIAvm02od8COln1AZM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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