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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9dbca2bd425b3d2fb4623a67a9fe6fafff3cab1566cc93efcf16a3e8fa7012e1' 
  AND token = 'pvV6L6bhIpHNzX91cFjNx1tP8oCcgvunDf39J986AQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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