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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '63651866518e90d927bc4549162d7907beaf3b5df47ba28fbf58a20759f8ed58' 
  AND token = 'Fsu4VEp2I3QsS8PHcnz3gXRO4r+87tE0uZXF8OyfAZo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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