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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '37fd97e43b882e50c46beffd34d50e0b5de199669417ef9630ccc1b0e46b87dd' 
  AND token = 'UO41RlTO8nx0wSoPxzP4l1uLGlAAPcQBrHpmftr0eF4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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