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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdc6ac5f27f3b052b4faafdf5e743916bf1332264d09d6b11d2178e4cf134b47' 
  AND token = 'uI093SV5GAVGAk1DlKVyr2j1FbMuVJaRkN1yCqZ7mLQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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