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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07eea69d3e980d3b9a16aa611551c3e978b58ffd25e8544dfea53b52d3a66001' 
  AND token = '5NMnkFBV5nnm6uf4DRuD7rxfCYq6b6JX8CaArGq/M/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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