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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eddc7634200895334776fc30468465209b942d1d93094a1b91c80052e0c8640d' 
  AND token = 'rA9JL0pBipcOTaAA6oHL3esa1TXvKUDhd+m5jkF6Cfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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